Hmm... perhaps it's the new option to do miles plus cash for J/F that is causing that message? Meaning, perhaps now the lowest miles plus cash option for J is 75k (per person) plus some amount of cash.

Not sure, but that is my first thought. I have not heard about a reward sale.

*Update: I just did a dummy booking and it did offer me 3 choices of miles plus money, the lowest miles offer being 75k per person. Next was 90k, followed by the standard 100k offer. So unfortunately, no miles sale!